1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4157196867a775655284e3e4303085395d7ae0063ca9d9528ce346396aa7147. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7bc8fa6f-cc70-4fd1-87e8-6466c1cd9608.json and https://artists.proofprofile.net/proofs/artist/7bc8fa6f-cc70-4fd1-87e8-6466c1cd9608.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbadc8d5590e3967175047438f36bbca8e66bcc5c9e27fcabb1ccd95c93211ac. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZPLS2273391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc999db5cb3386fb0e0780d10518e8f111e6665d81a448c65df115432692af7a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX8LE2492329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3dc01ca57f03b5662aa5873bb816ca1bce41ddadb20b3962cec4e0ba20eeae. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX8LE2496979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cafca76de64f6153321671ea4dc29b390a3313841e16bbe34d9e332b2db2249. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX8LE2475307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9fd6f81a52cbed177577bce6ea19869662b17afe4600eba6479affc80262258. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX8LE2485949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb413945d21fff548c9438cf1ed13dd3867da3ccc751a0d8ceafdba07c66875e. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX8LE2432926.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c02d74be60160395e1f1a261097607a010a3eb02f8e7f54cff329ee29ca136. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX8LE2462621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a4d06347c4e5cb4f18ab766fefd68b065fba60101247885fd19bc9c30276813. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX8LE2494940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c1370620a99fff3b57f0c4f2f1e2b62ac629f28da5a457fe27065ad8870e25. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX89G2348065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e0215e9b43727bdb1dfcbaef132e8ab297f8524f65c8c7c7a6a645099694db. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX89G2321374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4149f81d260579d7fa20ccdfc1da9bd4bb7a7dffbe2b47e8524012cba5d0596. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX89G2388663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52df944ec20c02c8fd4ebfebbcbd9dca19c7b358b0d7a7e32047ff9649608d74. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX89G2308731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939f7183c363a9738360c7dc6dcd09d9309d1dc7fc1e2541b622c071a43df9b5. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX89G2375015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0bf138abe7ff5ca8e1183ef97f4567e6d854b6a74f3c2605ab11e91381222b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX89G2327500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295357b1546d1c310c794dbd93855f17f7dacd6e13baada9d5396c68082065a5. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX89G2340608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b59d5c335c2c2ef0709367390efe8fbc77e469f285a5594ef85a2af280525a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX89G2392900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e96fb6f689c2afc6cff9f2485f6de4d4cd83204c939fcf0b784f07ed27ddaf7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX89G2351111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dfc7d7815941316282e20dff76bb84cbfc68c12266ad3b28f696d8fa8185a14. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX89G2302933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea2386396441746681aebf16c079990a3d0fae31f64bbe52452ec0454098d4d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX89G2347632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a6e4a4c8d67ff07c7131f8ef157f474c367ba56df7e84438da13339f86821c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX89G2335159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d794f251151e9c900ee6a17e251aaa2c7d1fb8a00c3e93d44812f0ec1289436. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX89G2340833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1774c9a94fe73e8b74f6af455cc09369603ea69259864745fdef7cce8450cabc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX89G2362331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf89cc7207eff3ade0803d007456bd54842ae718a7dff3409c98041a79c6d8416. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX89G2327509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169670bf6cf3bafb0fbdd4262d398a28d7ff5402ca6fd0b77edd9a2e9b1ea38c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX89G2372942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69dfa7507dfe94cd0b09f708c23d1b74269ae93a89bb913954960090a2a4920d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX89G2326326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f8504b2d575434fbc9820aa171f9b59a157e16b0ff95f2619f7919fdc401cb0. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX89G2300919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9feeee2226c40410521a249355487305a893328db23c4ae71f4e3cddbdf21c. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX89G2358224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf010e6260f3c47e717fca330110b70c7b1bb8f3e05aaea1586ae51dc0dd73b68. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX89G2313841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d646111caa424cf0f35bcdf49c112eb0431df41cd117ea3e5f7da5b23b6d97. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX89G2373520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d6d4c32057672bd067a2030de68faec4ba50516697681fff9e8ba6f51963274. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX89G2320589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b61f36f55f8d99491916b7c46e1ab01c5db84042b3c53d193a05821614f384. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX89G2315679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b374627d849dea0babf590f4e1ae85ac9fa3ffd7a80ca0f7965e29b9bd8d698. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX89G2359805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea99e19e7ef342de75e9dec28ea4d8869ad741103340008ddb7ee142710bc225. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX89G2324166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x724eecfab913c340e46e20a8ba77a7eaa9a96dfbb202588eace96830c4f60d8e. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX89G2344300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf30dabaef5f090eb30644110c619670f5440970b292262f92eb638841dbc3058. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX89G2300184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5dcd70be973783a5c30422194ff61de9412934931fbcb2f251870a1ac996a0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX38U2409173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe19732094e025ceed04ab590275ec0a4501dc441b0cf58c4d65bdeab09d25c83. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX38U2367395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962b8889f35a5fbdaf3c81d7b9433b15c87d376aae2b4b90b86415520c7d211d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX5MX2466202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3604d668e55dfc7ab45ac18d53bd04c8524d9c53d19a0445ddeb41fc20f0c953. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX4R52379496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc663e938351a8dfbb82adb20ca8ac3a3603efc2386d7dea1b88c311585df9403. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZS662265780.